中值滤波 降噪 可有效滤除高斯和椒盐噪声 保持图像边缘-medfilt2

对语音信号假入宽带高斯白噪声并用小波降噪-add white noise to signal and decrease it with wavelet

BPSK与QPSK调制解调系统的Matlab仿真程序； 发送滤波器与接收滤波器均为根升余弦滚降滤波器； 信道噪声为加性高斯白噪声； 绘制BPSK与QPSK调制下的误码率与信噪比曲线图，并与理论曲线进行对比。 -BPSK and QPSK modulation and demodulation systems Matlab simulation program transmit and receive filters are root raised cosine filter

针对高斯白噪声，高斯色噪声以及色噪声中常见的粉红色噪声进行了降噪处理，并与相关系数法、小波软阈值降噪方法进行了对比- Gaussian white noise, Gaussian colored noise and pink noise have been processed to verify the validity of the algorithm. we also compared the proposed method with the correlation coefficient

分别产生符合下列要求的眼图，输入调制方式为2PAM和4PAM，符号率为1Hz，等效信道滤波器为升余弦滚降成形滤波器(缺省滚降系数为0.5)： 1) 无噪声和信噪比为20dB的加性高斯白噪声 2) 升余弦滚降系数分别为0.5和1 3) 受到码间串扰影响，信道参数可设为：ch=[0.9806; -0.1961]；(In accordance with the following requirements of eye respectively, the input modulation mod